We're a manufacturer of chemical products from P. R. China. We're the main leading manufacturer of long-chain diacid, diol, and cathaybiotech products in mainland China. Our products include Dodecanedioic Acid(ddda,CAS No.:693-23-2), Brassylic Acid(CAS No.:505-52-2), Tetradecanedioic Acid (C14H26O4,CAS No.:821-38-5).